Two blocks are attached by a light string with one resting on a rough table and
ID: 1904160 • Letter: T
Question
Two blocks are attached by a light string with one resting on a rough table and the other hanging over the edge via a frictionless pulley. If the blocks are initially at rest, the tension force is equal to the hanging weight. As the weight of the hanging block is increased, eventually the blocks will move. At that point is the tension in the string more, the same or less than the weight of the hanging block and why? If the hanging weight were continuously increased, would the tension force change gradually or abruptly when the blocks move and why?Explanation / Answer
it has to be less than the weight since the net force on the block = weight - T if they equalled they wouldnt move. It will change suddenly since it will move from static friction to kinetic friction.